Question

if y varies directly as x and y = 4 when x = 10 what is y when x is 15​

Answer 1

Answer:

The should maintain the same ratio so

y/x =4/10

hence for what value of y, x is 55

then

4/10 =y/55

then y = 22 by simplifying

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braine

Teacher.

Answer 2

Answer:

When #y = 10#, #x = 2#

#10 = k × 2#

#k = 10/2#

#k = 5#

When #x = 3#

#y = k × 3#

#y = 5 × 3 = 15#